Feed-water heater.



LLOML.

J. MUCHKA.

FEED WATER HEATER.

APPLICATION FILED Nov. Is, 1910,

Patented Mal". 18, 1913.

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UNITED STATES JOSEF vlYIUGI-IKA, OF VIENNA, AUSTRIA-HUNGARY.

FEED-WATER HEATER.

Specification of Letters Patent.

Patented Mar. 18, 1913.

Application led November 18, 1910. Serial No. 593,005.

To al whom t may concern:

Be it known that I, J oser MUGHKA, a citi-- to 100o C.,by direct contact with exhaust steam freed om oil, or with fresh'steam,

with simultaneous purification of the water4 from mineral substances and gaseous products by forcing the water to circulate several times through the feed heater with intermediate periods of rest, so that the Water comes repeatedly into contact with the eX- haust steam, thus being progressively heated by the latter, a certain period of rest being allowed for the precipitation of mlneral substances after the int-imate commingling of the steam and water.

The circulation of water by means of a pump is already known in steam storage apparatus from which the water is withdrawn and again injected through spraying nozzles. The object of such apparatus is however, to obtain a rapid and intimate mixture of the steam with the Water, for the purpose.

of producing andstoring of saturated steam, which is used as such while the water theoretically. constant in quant-ity is forced through the apparatus. kIt has also already been proposed` in boiler feed apparatus to provide a feed heater in which the water can be forced several times through the feed heater. In known apparatus of this kind,

however, the auxiliary pump acts in the manner above described, onl when the quantity of water fed bythe eed pum l is smaller than lthe quantity of Water supp ied by the auxiliary pump, while, when the feed pump is Working at full load the auxiliary pump cannot effect the repeated circulation of the water.

According to the vpresent invention an auxiliary circulating pump of greater capacity than the boiler feed pump isutilized,

which continues to remove water from the feed heater and return it when,the feed pump is acting at full load so that if in consequence of a stoppage of the feed pump thewater in the feed heater falls to a predetermined level the auxiliary pump will also draw in fresh water. In such installations where. it is not possible to arrange "to operate adjacent the feed pump a circulating pump of greater capacity, the exhaust steam for heating purposes or the like (or even fresh steam) is brought into contact directly with the. water to be kheated by the use of an injector-like nozzle and the ikmetic energy of the steam is utilized in conjunction with the suction effect produced thereby to obtain repeated circulation `of the water to be heated through the feed water heater.

The drawing shows a vertical section of a construction working'with an auxiliary pump.

Referring tothe drawing, -1 represents the steam cylinder of the feed pump, 2 the steam 'supply pipe for the pump, 3 the pipe for the exhaust `which "passes rst throughl the oil extractor 4 and from there through the pipe 5 into the feed water heater 6; 7 represents Athe boiler feed pump, 81ts suction pipe leadin from the' feed heater 6, and 9 is the disc arge pipe of the boiler feed pump leading to the boiler'.

l0 is the water sup ly pump which is advantageously coupled) direct to the feed pump 7 and has a greater output (about one half' more) `than the latter; 11 is the suction pipe and-12is the delivery ipe of ,the water circula-ting pump; the elivery pipe`12 leads to a point beneath a defiector 13 in the feed waterheater 6. The exhaust pipe 5 which is provided with a deflector 14 1s also led into the heater, which has further connected to it the suction pipe 8 of the boiler feed pump7 and the suction pipe -11 of the water "circulating pump 10. 1n the suction pipe 11 is arranged a reversing valve 15 operated by afloat 16 in the feed heater 6.and enabling the water circulating pump to draw direct 'from the well 18 through the suction pipe 17 connected to the reversing 'valve l5 'when the water'level in the feed heater is lowgi at high water level linthe latter thesuction pipe 17 is closed and the pump; is only in communication with the suction pi e 11.

The operationfo the apparatus'is as follows z-lVhen the pumps are started byl opening the valve in the steam pipe 2 the boiler feed pump 7 runs free at first, as lthe feed heater from which alone the pump can draw water so far conta-ins no water during this starting period the boiler feed pump may be put out of operation by a valve con- 'i siton to placethe circulating pump directly in communication with the heater and When in the other position to place said circulating pump in direct communication with the fresh Water supply through the medium of the pipe leading therefrom, and means oon-' trolled by the level of the Water inthe heater for :iutomatically operating said reversing valve in the manner and for the purposes set forth.

Signed :1t- Vienna in the county of LoWer- 15 Austria :1nd State of Austria-Hungary this third day of November A. D. 1910.

JOSEF MUCHKA.

Witnesses? WILHELM BERGER, ADELAIDE FUNK. 

